Troubles (dual) booting into openSUSE after fresh installation from Win10

English Install/Boot/Login
1

Hello everybody,

I just installed openSUSE LEAP 15 onto my SSD from a USB-stick.
Everything went fine except it did not reboot into the OS after the installation.
Although I have openSUSE selected as my first choice in the
boot options menu of the UEFI Bios, it simply will not start,
hence the computer keeps booting into the alternative Win10.

I have no knowledge of Linux and I just watched a few tutorials.
Before the installation, I deactivated fast startup and secure boot.

Thanks a lot for helping me out.

2

Can you list the content “\EFI\opensuse” in your EFI system partition.

You may have to boot your install media to rescue mode, the mount the EFI partition at “/mnt”. Then

ls -l /mnt/EFI/opensuse

If opensuse is first in the BIOS UEFI menu, then you ought to at least get a grub prompt.

3

Sorry, but I did not manage to list the partition content. I am a dumb Windows casual, you know.

get-partition

PartitionNumber DriveLetter Offset Size Type

1 1048576 350 MB IFS
2 C 368050176 182.1 GB IFS
0 195899162624 50 GB XINT13 Extended ### I made that one myself.
4 195900211200 500 MB Unknown
5 196425547776 27.11 GB Unknown
6 225532968960 14.74 GB Unknown
7 241359126528 7.66 GB Unknown
3 249586253824 450 MB Unknown

mountvol

\?\Volume{c3edf966-0000-0000-0000-100000000000}
*** NO MOUNT POINTS ***

\\?\Volume{e9265456-3c02-11e8-906e-08626627b33d}\
    E:\

\\?\Volume{c3edf966-0000-0000-0000-f01500000000}\
    C:\

\\?\Volume{c3edf966-0000-0000-0000-801c3a000000}\
    *** NO MOUNT POINTS ***

It is clearly there somehow. But I could not find a way
to list the content. Also, I do not get a grub prompt.

Two weird things:

  1. I realised that in the ASUS UEFI Bios Utility opensuse only
    shows up in EZ-Mode. When I do the same in the advanced section,
    opensuse has completely disappeared as a boot option.

  2. When I boot the installation medium, nothing works anymore.
    I cannot even open the rescue system part.

Anyways, to make some progress: I would really like to keep Win10
for now and just deinstall opensuse, then perhaps gain more
knowledge about the installation and then try it again.

Any tips to make that work?

Thanks and kind regards.

4

That already answers some questions.

If you have an extended partition, then your disk is using legacy BIOS/MBR partitioning.

If you are using legacy partitioning, and Windows is working, then you are not using UEFI for booting.

Most likely, what went wrong is that you somehow installed openSUSE for UEFI booting but the computer is set for legacy booting. But that’s just a guess.

As for uninstalling openSUSE – the simplest option is to do nothing. Just consider those partitions (the ones where you installed openSUSE) to be free for whatever you want to use them for in future. Leaving some data/software bits on the disk isn’t going to hurt anything.

5

All right, that is good to know. Thanks again for your help.